| Catalyst recycling via specific non-covalent adsorption on modified silicas. | |
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MedLine Citation:
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PMID: 23292126 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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This article describes a new strategy for the recycling of a homogeneous hydroformylation catalyst, by selective adsorption of the catalyst to tailor-made supports after a batchwise reaction. The separation of the catalyst from the product mixture is based on selective non-covalent supramolecular interactions between a ligand and the support. Changing the solvent releases the active catalyst back into the reactor and allows a subsequent batch reaction with the recycled active catalyst. For this purpose, the bidentate NixantPhos ligand has been equipped with a pyridine group. The corresponding rhodium pre-catalyst [Rh(Nix-py)(acac)] (acac = acetylacetonate) forms a very selective, active and highly stable catalyst, and able to reach a turnover number (TON) of 170 000 in a single run (reaction performed in nearly neat 1-octene, S/C ratio of 200 000, at 140 °C, 20 bars syngas pressure). Various commercially available supports have been explored in binding studies and recycling experiments. The end-capped silica-alumina performs the best so far with respect to ligand-adsorbing properties for the current purpose. Although this system has not been fully optimized, four recycling runs could be performed successfully. |
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Authors:
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Alexander M Kluwer; Chretien Simons; Quinten Knijnenburg; Jarl Ivar van der Vlugt; Bas de Bruin; Joost N H Reek |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-4 |
Journal Detail:
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Title: Dalton transactions (Cambridge, England : 2003) Volume: - ISSN: 1477-9234 ISO Abbreviation: Dalton Trans Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-7 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101176026 Medline TA: Dalton Trans Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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InCatT B.V. Science Park 904, 1098 XH Amsterdam, The Netherlands. joost.reek@incatt.nl sander.kluwer@incatt.nl. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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